chore: release 2.4.3 (#478)

🤖 I have created a release \*beep\* \*boop\*
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### [2.4.3](https://www.github.com/googleapis/nodejs-cloud-container/compare/v2.4.2...v2.4.3) (2021-08-16)


### Bug Fixes

* **build:** migrate to using main branch ([#476](https://www.github.com/googleapis/nodejs-cloud-container/issues/476)) ([7440626](https://www.github.com/googleapis/nodejs-cloud-container/commit/7440626c34f9e7dcc16a6e19a71e5db6eee5b6bf))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

container/snippets/package.json

@@ -14,7 +14,7 @@
     "test": "mocha system-test --timeout 10000"
   },
   "dependencies": {
-    "@google-cloud/container": "^2.4.2"
+    "@google-cloud/container": "^2.4.3"
   },
   "devDependencies": {
     "chai": "^4.2.0",